126840763171 has 16 divisors (see below), whose sum is σ = 134559705600. Its totient is φ = 119150697600.

The previous prime is 126840763139. The next prime is 126840763187. The reversal of 126840763171 is 171367048621.

It is a cyclic number.

It is not a de Polignac number, because 126840763171 - 2⁵ = 126840763139 is a prime.

It is not an unprimeable number, because it can be changed into a prime (126840760171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25616746 + ... + 25621696.

It is an arithmetic number, because the mean of its divisors is an integer number (8409981600).

Almost surely, 2^126840763171 is an apocalyptic number.

126840763171 is a deficient number, since it is larger than the sum of its proper divisors (7718942429).

126840763171 is a wasteful number, since it uses less digits than its factorization.

126840763171 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7554.

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 126840763171 in words is "one hundred twenty-six billion, eight hundred forty million, seven hundred sixty-three thousand, one hundred seventy-one".